You are talking about PNG export, right? Because with SVG you can just crop any portion of a map without quality loss. The problem is that due to implementation details of OpenFL (which is used as a drawing engine) I can't implement zooming. Eventually it will be fixed this way or another.
2 years ago(+1)
No, I'm talking about SVG. Right now the SVG export and the image shown in the browser have little in common. Specifically, the SVG is always portrait and includes a lot of empty space. That means editing every exported file manually.